1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nata [24]
3 years ago
8

The equation y=x^2-12x+45 models the number of books y sold in a bookstore x days after an award-winning author appeared at an a

utograph-signing reception.
How many books were sold at the autograph session?

What is the minimum nunber of books sold?

What day did that occur?

How many books were sold on day fifteen?​
Mathematics
2 answers:
choli [55]3 years ago
7 0

Answer:

3.2

Step-by-step explanation:

xz_007 [3.2K]3 years ago
3 0

Answer:

Answer: The first day the author reaches 100 days is on day 16.

To solve this problem, you could use a graphing calculator to graph the given equation. Then, determine when this line crosses 100. It crosses when x = 15.539. Therefore, we would have to round up to 16 so it is at least 100.

You could use the quadratic equation to solve: 100 = x^2 -12x + 45

Either you will get 16. If you use the quadratic formula, make sure to only use the positive answer.

You might be interested in
Is (3,9) a solution of the system
Verdich [7]
Yes it because any function can be a solution to any certain number of different systems
6 0
3 years ago
What is the pythagorean theorem
Molodets [167]
C in square=A in square+B in square
6 0
3 years ago
Read 2 more answers
David found and factored out the GCF of the polynomial 80b4 – 32b2c3 + 48b4c. His work is below. GFC of 80, 32, and 48: 16 GCF o
BlackZzzverrR [31]

Answer: The correct statements are

The GCF of the coefficients is correct.

The variable c is not common to all terms, so a power of c should not have been factored out.

David applied the distributive property.

Step-by-step explanation:

GCF = Greatest common factor

1) GCF of coefficients : (80,32,48)

80 = 2 × 2 × 2 × 2 × 5

32 = 2 × 2 × 2 × 2 × 2

48 = 2 × 2 × 2 × 2 × 3

GCF of coefficients : (80,32,48) is 16.

2) GCF of variables :(b^4,b^2,b^4)

b^4= b × b × b × b

b^2 = b × b

b^4 =b × b × b × b

GCF of variables :(b^4,b^2,b^4) is b^2

3) GCF of c^3 and c: c is not the GCF of the polynomial. The variable c is not common to all terms, so a power of c should not have been factored out.

4) 80b^4-32b^2c^3+48b^4c

=16b^2(5b^2-2c^3+3b^2c)

David applied the distributive property.

7 0
3 years ago
Read 3 more answers
Alex scored 70% in a spelling test with 20 quetions
amm1812

Answer:

This means that Alex answered 14 questions correctly

Step-by-step explanation:

<u>Step 1:  Find an equation</u>

20 * 0.7 = x

<u>Step 2:  Multiply</u>

20 * 0.7 = x

14 = x

Answer:  This means that Alex answered 14 questions correctly

5 0
3 years ago
Read 2 more answers
What shape can you make with a square and a triangle
Sliva [168]

Answer: dimond

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Find two pairs of integers whose sum is -6
    15·2 answers
  • What’s the correct answer
    13·1 answer
  • Please answer these questions I have an f if I don't get help I will die
    6·1 answer
  • A railway tunnel 147m long is to be bored with a circular cross section of radius 5m.what volume of soil has to be excavated?
    5·1 answer
  • Use a strategy to solve this problem. (Note: I seriously need help and this is due on Sunday!!)
    10·1 answer
  • Put the following in -1/4, -5.0, 0.7, 4/5
    7·1 answer
  • Solve for x? <br> 5x^2 + 16x -3 = 0
    15·1 answer
  • HELP WITH 1-4 !!!!!
    5·1 answer
  • Find the gcf of 12,30,72
    5·1 answer
  • The price of an item yesterday was $180 today the price fell to $99 find the percentage decrease
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!